Cisco ASR 9000 Series routers are high-performance 
edge routers built for service provider networks. They run on the IOS 
XR operating system, offering high availability, scalability, and support for 
advanced features like MPLS, Segment Routing,
EVPN, and automation. Designed for applications such as broadband 
aggregation, mobile backhaul, and cloud-scale networking, the ASR 9000 series delivers reliability and flexibility.

Models include:
Modular chassis:
ASR 9006: 6-slot, compact, supports 2 line cards
ASR 9010: 10-slot, mid-size, supports 4 line cards
ASR 9904: 4-slot, compact, high 100G density
ASR 9910: 10-slot, supports higher capacity
ASR 9912: 12-slot, large-scale deployment
ASR 9922: 22-slot, for massive aggregation needs
Fixed-form factor:
ASR 9001: 2RU, integrated control and forwarding
ASR 9001-S: Cost-optimized version of 9001
ASR 9901: 2RU, supports 100G interfaces
ASR 9902: 2RU, higher port density than 9901